One of the most dangerous and difficult technical valleys in Iran, Tang Pasedio in Qazvin province with a difficulty level of V6.A7.||| It has the highest blue grade (A7), which was opened in 1995 after several identifications and investigations.
The water in this valley is very cold compared to other valleys, and even in September, the water temperature is low, so it is better to use a wetsuit with a strength of 5 or higher.
This valley is very short, but due to the presence of dangerous water currents, it is difficult and dangerous to navigate, and for this navigation, people, especially the technical staff, must be familiar with the techniques of working with ropes and knowledge of water currents.
So far, this valley has faced many challenges to Noordan valley and has caused many casualties. You should know that Tang Pasdio is not a suitable valley for beginners and untrained people and it is very dangerous.
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